From what I don't understand is why would u want your ex boyfriend to come and visit you? There might be a possible feelings involved, Sometimes people don't know that until it happened. I think it's all right to be friends with your ex but having him coming down to visit you does not look good. I understand that you care about him, I'm sure in your heart you still have feeling for him. Every ex's do. That's why I don't hang out with my ex's, just be their friend by talking to them once a while on the Internet not in person because I'm afraid that feelings might come back if we see each other in person. Those feelings are unavoidable, It's not simple to remove your ex from your heart, but you can control your emotion with your mind. But, people always say "follow your heart". That a risk that you shouldn't take, if you are with sequoias.
![Wink ;) ;)](/community/styles/default/xenforo/smilies/wink.png)
So, You can be Robert's friend but it's not necessary to have him come and visit you.